I have the same video card. Game runs with 10-15 fps with all settings on low, in windows runs with 30-45 fpsI use previous version of beta driver amdCheck, will you can run the source based games, tf2 for example?

There's unfortunately going to be a lot of this, with AMD in particular. I'm surprised people with Nvidia are having problems as the Nvidia drivers are generally extremely solid and as good as in Windows. I suspect most of these issues are driver side and will require a driver udpate. Could potentially be an engine error too though.

I don't know... the main menu is working fine and is in 3D...I suspect it may be an error with some scripts